J4 ›› 2014, Vol. 41 ›› Issue (2): 37-43.doi: 10.3969/j.issn.1001-2400.2014.02.007

• 研究论文 • 上一篇    下一篇

一种高精度的DBS图像拼接算法

陈洪猛;李明;贾璐;吴艳   

  1. (西安电子科技大学 雷达信号处理国家重点实验室,陕西 西安  710071)
  • 收稿日期:2012-11-12 出版日期:2014-04-20 发布日期:2014-05-30
  • 通讯作者: 陈洪猛
  • 作者简介:陈洪猛(1986-),男,西安电子科技大学博士研究生,E-mail:chenhongmeng123@163.com.
  • 基金资助:

    国家自然科学基金资助项目(61271297,61272281);国家部委预研基金资助项目(9140A07020913DZ01001);博士学科点科研专项基金资助项目(20110203110001)

High precision stitching algorithm for the DBS image

CHEN Hongmeng;LI Ming;JIA Lu;WU Yan   

  1. (National Key Lab. of Radar Signal Processing, Xidian Univ., Xi'an  710071, China)
  • Received:2012-11-12 Online:2014-04-20 Published:2014-05-30
  • Contact: CHEN Hongmeng

摘要:

由于载机平台的非理想运动(载机姿态与载机位置的变化),多普勒波束锐化(Doppler Beam Sharpening, DBS)图像的拼接质量受到较大影响.笔者建立了一种针对运动误差的仿射校正模型,并在此基础上提出一种基于仿射变换的DBS图像校正拼接算法.该算法首先对载机姿态与载机位置引起的误差同时进行校正以消除子图之间的错位与间断,然后对子图像进行拼接.仿真结果与实测数据表明,该算法在不增加计算复杂度的前提下,可有效校正载机的运动误差,实现DBS子图的高精度拼接.

关键词: 多普勒波束锐化, 仿射变换, 运动补偿, 图像拼接

Abstract:

The stitching quality of the Doppler Beam Sharpening (DBS) image will be greatly affected due to the non-ideal movement of the radar platform (variation in attitude and  position). This paper presents a correction model for the movement error. A novel method based on affine transformation is proposed, which can correct and stitch the DBS image effectively. By compensating the variation in attitude and position simultaneously, the discontinuity could be eliminated. Subsequently, the sub-image is stitched together. Simulation analysis and measured data results show that the algorithm can correct the motion error and stitch the sub-images effectively without increasing the computational complexity.

Key words: Doppler beam sharpening (DBS), affine transformation, motion correction, image stitching

中图分类号: 

  • TN957